Seasonal figures below use a 2025 reference year. Choose a date in the planner above for that day’s times, golden hour, twilight, and daylight milestones.
Seasonal Sun Milestones in Harlingen
Harlingen's 8 PM sunsets run from about April 25 to August 22 — 120 evenings in a typical year. The wider season of sunsets at 7 PM or later lasts 224 days, from March 9 to October 18. Even in midwinter, sunset here never falls before 5 PM on the clock.
Days in Harlingen first reach 12 hours of daylight around March 15, a few days before the March equinox, and drop back under 12 hours after September 26.
The Sun's rising point moves along the horizon too. Around the June solstice it rises in the ENE (63°) and sets in the WNW (297°); by the December solstice it rises in the ESE (116°) and sets in the WSW (244°). That is a 53° swing — worth knowing when choosing a west-facing viewpoint for a summer sunset or an east-facing window for winter morning light.
Dates use the 2025 reference year. Clock-time milestones near daylight-saving changes move with the second Sunday in March and the first Sunday in November.
Daylight Through the Year in Harlingen
Harlingen lies at just 26.19°N, close enough to the tropics that day length stays relatively even year-round. The difference between the longest and shortest day here is only 3h 17m.
On the summer solstice around June 21, Harlingen receives 13h 47m of daylight — the longest day of the year. By the winter solstice around December 21, that shrinks to 10h 30m, the shortest day. At the spring and autumn equinoxes, day and night are nearly equal at about 12h 8m, as they are everywhere on Earth.
Sunset moves fastest around September, when it shifts by up to 1.1 minutes a day in Harlingen, and barely moves for weeks around the solstices. See how sunrise and sunset change through the year for why.
The Sun's Path Over Harlingen
Where the Sun sits in the sky over Harlingen depends on the season, and the contrast between summer and winter is set by the city's latitude of 26.19°N. On the summer solstice the midday Sun climbs to 87.2° above the horizon in Harlingen — nearly straight overhead, leaving objects almost no shadow at solar noon. On the winter solstice the midday Sun only reaches 40.4°, sitting much lower in the southern sky and casting long shadows even at noon.
Those roughly 47 degrees separating the summer and winter midday Sun are exactly what give Harlingen its seasons.
The live sun path at the top of this page shows the Sun's altitude and compass bearing for the current moment or any chosen date.
Earliest and Latest Sunrises and Sunsets in Harlingen
It is natural to assume Harlingen sees its latest sunset on the longest day of the year, but it does not. The latest sunset actually falls around July 1 at about 8:27 PM, while the earliest sunset comes around November 29 at roughly 5:38 PM — noticeably before the December solstice.
On the morning side, the earliest sunrise in Harlingen is around June 9 at 6:38 AM, and the latest sunrise around March 9 at 7:46 AM. The equation of time and daylight saving pull these dates away from the solstices — explained in why the latest sunset isn't on the longest day.
How Daylight Saving Time Moves Sunrise and Sunset in Harlingen
Harlingen, Texas changes its clocks twice a year, and both changes are visible in this page's numbers. On the second Sunday in March, Harlingen springs forward and the evening changes overnight: sunset jumps from about 6:36 PM on Saturday to about 7:37 PM on Sunday. The price is paid at dawn — sunrise slips from around 6:47 AM back to 7:46 AM, so mornings turn dark again just as they were brightening.
The reverse comes on the first Sunday in November, when clocks fall back: sunset drops from about 6:48 PM to 5:48 PM in a single day — the abrupt start of the early-dusk season — while sunrise brightens from around 7:40 AM to 6:41 AM.
Only the clock label shifts on those Sundays; the times above are for a typical year. More in how daylight saving time changes sunrise and sunset.
Golden Hour & Blue Hour Photography in Harlingen
For photographers in Harlingen, Texas, the planner shows your selected date's morning and evening golden-hour and blue-hour windows. Choose Today, Tomorrow, or a date in the calendar; all clock times are calculated in Harlingen's local timezone.
Golden "hour" is a misnomer — its length in Harlingen depends on the season, because it lasts as long as the Sun takes to climb from the horizon to 6° (or descend back). Around the equinoxes it runs about 30 minutes; near the June solstice, when the Sun rises and sets at a shallower angle, it stretches to roughly 34 minutes, and near the December solstice it lasts about 34 minutes.
See the golden hour guide and blue hour guide for how to plan a shoot around these windows.
Solar Energy Potential in Harlingen
Under clear skies, Harlingen, Texas receives about 6.1 peak sun hours per day averaged across the year — from roughly 3.6 in December up to 8.2 in June. One peak sun hour equals one hour of sunlight at full intensity (1 kW/m²), the standard unit for estimating solar panel output.
Because Harlingen sits at 26.2°N, a fixed, south-facing panel captures the most energy over the year when tilted at roughly 26° from horizontal — about equal to the latitude. If you adjust the tilt seasonally, flatten to about 11° in summer, when the Sun rides high, and steepen to about 41° in winter, when it stays low.
These are clear-sky upper bounds from Harlingen's solar geometry, not a forecast; clouds, shading, and equipment lower real output. See what peak sun hours mean.
How Harlingen Compares
Daylight in Harlingen swings 3h 17m between the June and December solstices. The median across the 1,847 cities on this site is 5h 16m, so Harlingen has a 1h 59m gentler seasonal swing than a typical American city. By that measure Harlingen ranks 1777th of 1,847 nationally, and 127th of the 131 Texas cities listed here — counting from the largest swing down.
Harlingen sits about 7.7° west of 90°W — the meridian Central Time is built around. Longitude alone therefore puts mean solar noon roughly 31 minutes after clock noon in standard time, so the Sun runs behind the clock here, which is why evenings hold light later than the time zone would suggest. The equation of time then moves true solar noon up to about 16 minutes either side of that through the year.
About Sun Times in Harlingen
Harlingen, Texas, has an estimated urban-area population of 116,926. Its primary county or equivalent is Cameron; its center is at 26.19°N, 97.70°W. Clocks here follow Central Time, which is the timezone all sunrise, sunset, golden-hour and twilight times on this page are shown in.
Times are computed for Harlingen's city-center coordinates, so towns to the east see each event slightly earlier and towns to the west slightly later; the nearby-cities list above shows the typical gap.